Strong Stream High-brightness Heavy Ion Beam Transport In Linear Induction Accelerator Simulation Study

High power particle beams are applied in many science research fields and has become the powerful research instrument,such as the simulator of nucleus exploder, high power flash X ray photography,inertial restriction fusion,high energy density physics(HEDP),the production of high power microwave and so on.Intense heavy ion beams drived by accelerator provide an excellent tool which can research homogeneous HEDP.But how to transport the intense heavy ion beam to the exit of the accelerator succcessfully is the most important problem for the accelerator.In this paper,we investigate the needed matched magnetic fields in which the intense heavy ion beam was transported in a linear induction accelerator(LIA).First, the beam transport theory is analyzed detailedly.According to the requirement of ion beams parameters which is needed by the research of high energy density materials,we calculate the matched magnetic fields in which the intense heavy ion beam transport is needed by using the envelope equation.Then apply electromagnetic particle-in-cell method to simulate intense heavy ion beams trsnsporting in a linear induction accelerator(LIA) with MAGIC codes,especially examined the transverse confined magnetic fields when the beams are transported,modified the distribution of magnetic fields calculated from the envelope equation.Finally,the matched magnetic fields distributing of ten acceleration units when beams transporting are obtained successfully. The simulation results could have a instructional significance to the engineering practice, and also provide a theory reference for debugging the magnetic fields of the accelerators.